#!/usr/bin/env ruby

require "optparse"
require "pathname"
require "fileutils"

options = {}

optparse = OptionParser.new do|opts|
  opts.banner = "Usage: macgag COMMAND [OPTIONS] DIR"
  opts.banner += "\n\tAvailable commands are:"
  opts.banner += "\n\t build - build application in DIR"
  opts.banner += "\n\t new - new application in DIR"

  opts.on( "-n", "--name NAME", "Application name" ) do |name|
    options[:name] = name
  end

  options[:output] = Dir.pwd
  opts.on( "-o", "--output DIR", "Output application to DIR" ) do |dir|
    options[:output] = dir
  end

  opts.on( "-h", "--help", "Display this screen" ) do
    puts opts
    exit
  end
end

optparse.parse!

command    = ARGV[0]
public_dir = ARGV[1]

unless command && public_dir
  puts optparse
  exit
end

# Setup directories
public_dir       = Pathname.new(public_dir).expand_path
options[:name] ||= public_dir.basename.to_s
build_dir        = Pathname.new(options[:output]).join(options[:name] + ".app")
lib_dir          = Pathname.new(File.join(__FILE__, *%w{.. ..})).expand_path

case command
when "build"
when "new"
  public_dir.mkpath
  FileUtils.cp_r(
    lib_dir.join("assets", "index.html"),
    public_dir
  )
  puts "Created application in #{public_dir}"
  exit
else
  puts optparse
  exit
end

FileUtils.rm_rf build_dir
build_dir.parent.mkpath

# Copy over MacGap
FileUtils.cp_r(
  lib_dir.join("assets", "MacGap.app"), 
  build_dir
)

FileUtils.cd build_dir.join("Contents") do
  build_dir = Pathname.new(Dir.pwd)
  
  # Copy over public dir
  build_public_dir = build_dir.join("Resources", "public")
  FileUtils.rm_rf build_public_dir
  FileUtils.cp_r(public_dir, build_public_dir)
  
  png_icon_path = public_dir.join("application.png")
  icon_path     = public_dir.join("application.icns")
  
  if png_icon_path.exist?
    `sips -s format icns #{png_icon_path} --out #{icon_path}`
  end

  # Copy over icon
  if icon_path.exist?
    FileUtils.cp_r(
      icon_path,
      build_dir.join("Resources", "application.icns")
    )
  end

  # Rename MacGap to specified name
  exe_path = build_dir.join("MacOS", "MacGap")
  renamed_exe_path = build_dir.join("MacOS", options[:name])
  exe_path.rename(renamed_exe_path)
  renamed_exe_path.chmod(0755)
  
  plist = build_dir.join("Info.plist").read
  plist.gsub!("MacGap", options[:name])
  build_dir.join("Info.plist").open("w+") {|io| io.write plist }
end

puts "Built application in #{build_dir.parent}"